package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartyFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @Author:Panghl
 * @Description:
 * @Date: Created in 20:45 2022/7/12
 * @Modified By:
 */
@Controller
@Slf4j
public class LoginController {

    @Autowired
    private ThirdPartyFeignService thirdPartyFeignService;
    @Autowired
    private MemberFeignService memberFeignService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone) {
        //todo: 1. 接口防刷


        // 解决验证码60s重刷问题
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (StringUtils.isNotEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                // 60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2. 验证码的再次校验 redis。 存key-phone 、 value-code
        String code = UUID.randomUUID().toString().substring(0, 5);

        //redis缓存验证码，防止同一个phone在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, code + "_" + System.currentTimeMillis(), 10, TimeUnit.MINUTES);

        R r = thirdPartyFeignService.sendCode(phone, code);
        log.info("短信响应信息:{}", JSONObject.toJSONString(r));
        if (r.getCode() == 0) {
            return R.ok();
        } else {
            return R.error();
        }
    }

    /**
     * //todo 重定向携带数据，利用session原理，将数据放在session中，
     * //只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉
     *  出现分布式session问题
     * RedirectAttributes 模拟重定向携带数据
     *
     * @param vo
     * @param result
     * @param model
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo,
                         BindingResult result,
                         RedirectAttributes model) {
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(
                    Collectors.toMap(FieldError::getField,
                            FieldError::getDefaultMessage, (v1, v2) -> {
                                return v1;
                            }));
            model.addFlashAttribute("errors", errors);
            //Request method POST not support
            // 用户注册 -> /regist[post] ---> 转发/reg.html (路径映射默认都是get方式访问的)

            // 校验出错，重定向到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1、校验验证码
        String inputCode = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            String s1 = s.split("_")[0];
            if (inputCode.equals(s1)){
                // 删除验证; 令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                // 验证码通过          // 真正的注册. 调用远程服务完成注册
                R r = memberFeignService.regist(vo);
                if (r.getCode()==0){
                    return "login.html";
                }else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg",new TypeReference<String>() {}));
                    model.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else {
                Map<String,String > errors = new HashMap<>();
                errors.put("code","验证码错误");
                model.addFlashAttribute("errors",errors);
                // 校验出错，重定向到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            Map<String,String > errors = new HashMap<>();
            errors.put("code","验证码错误");
            model.addFlashAttribute("errors",errors);
            // 校验出错，重定向到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }


    @PostMapping("/login")
    public String login(UserLoginVo vo,RedirectAttributes redirectAttributes){
        R r = memberFeignService.login(vo);
        if (r.getCode()==0){
            // 成功
            return "redirect:http://gulimall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",r.getData("msg",new TypeReference<String>(){
            }));
            redirectAttributes.addFlashAttribute("errors",errors);
            // 错误
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
}
